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NASA's Curiosity Mars Rover Discovers a Field of Honeycomb Textures

3 weeks 3 days ago
NASA's Curiosity rover has sent back images of honeycomb-like textures called polygonal fractures, each one about 1.5 to 3 inches (4 to 8 centimeters) across. NASA reports: The mission has spotted small patches of these geometric shapes several times before, but nothing at the scale discovered in Valle Grande. In a 360-degree panorama that the rover captured on June 19 and 20, the 4,930th and 4,931st Martian days, or sols, of the mission, the polygonal shapes spread in all directions for as far as the rover can see... "[T]his sea of polygons took our breath away," said the mission's project scientist, Ashwin Vasavada of NASA's Jet Propulsion Laboratory in Southern California... Some of the polygons that the mission has spotted in the past clearly formed as mud cracks, though a variety of processes can contribute to their honeycomb textures, including cycles of warm and cold temperatures or compression that squeezed water out of the sediment when the surface was buried. These newly discovered polygons are among the many surprises Curiosity has trundled across since landing on Mars 14 years ago, on Aug. 5, 2012. Besides sulfur crystals, shiny meteorites, and other interesting geologic features, the rover has made major discoveries about the ancient Martian environment — most importantly, that it had the water, chemistry, and nutrients to support microbial life. Billions of years ago, lakes and streams dappled the lower foothills of Mount Sharp, a 3-mile-tall (5-kilometer-tall) mountain that Curiosity has been ascending since 2014. The rover has previously uncovered chemistry left over from Mars' watery history, including carbon-based molecules believed to be precursors to RNA and DNA, two nucleic acids that carry genetic information. Scientists have no way of knowing whether these organic molecules were created by biologic or geologic processes — either path is possible — but their discovery reconfirmed that ancient Mars had the right chemistry to support life. Dark, pebble-sized rocks also litter the area, NASA writes in a blog post, saying it's a "still-to-be-resolved question" as to whether they're bits of Mars that "floated" down from higher in the sediment layers, or "were ejected from distant impacts outside of Gale crater, or are meteorites from beyond Mars altogether."

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EditorDavid

Apple's Stock Drops Nearly 10%. How Will It Respond to Memory Shortage?

3 weeks 3 days ago
Apple's stock "fell just shy of 10% on Friday," reports Yahoo Finance, "after CEO Tim Cook warned about the impact of the global memory shortage on the company's business." During Apple's third quarter earnings call, Cook said the company paid significantly more for memory in the quarter and expects that to further increase in the current period. And while Apple is able to offset some of that price jump, it won't be able to tackle it all... The CEO said that iPhone and Mac sales outpaced Apple's own expectations and that a lack of flexibility in the supply chain is making it more difficult to keep up with demand. Yahoo Finance cited an investment analyst who predicts overall gross margins for Apple's iPhone could drop from 38% to 34.5%. But another analyst sees a scenario where Apple "raises iPhone prices, unit growth will slow, and as unit growth slows, so will user growth, which we think ultimately will slow Services growth." (Still, Yahoo Finance predicts Apple's new leasing program "could help address those concerns.") Apple has another controversial option, according to the blog 9to5Mac: Bloomberg reports that US senators from both sides of the aisle are urging Apple CEO Tim Cook to commit by August 21 to not using memory chips from Chinese suppliers CXMT and YMTC.... Apple is not required to obtain U.S. government approval to purchase chips from the companies, but doing so without the administration's support could expose it to significant political ramifications. Which is why, in an interview with The Wall Street Journal ahead of Apple's recent price hikes, Tim Cook said that "everything needs to be on the table," adding that "we should look at all supply...." More recently, the Journal reported that Apple's use of Chinese memory chips could extend beyond China, with the company seeking the administration's blessing to use components from CXMT and YMTC in products sold elsewhere outside the US. The report also detailed Micron's efforts to persuade the administration to reject Apple's request, arguing that allowing Chinese suppliers into Apple's supply chain could undermine domestic memory production... [Bloomberg's reported that U.S. lawmakers warned] other companies could follow Apple's lead, potentially undermining domestic memory production and planned investments in states such as Indiana, Idaho, New York, and Virginia... [T]he senators sought details about any information Apple has shared with CXMT during the component qualification process, noting that the transfer of controlled technical information to advanced chipmaking facilities in China may require a Commerce Department license. The blog MacRumors notes that Apple has already increased prices for Macs and iPads in June because of surging memory prices. Apple CEO Tim Cook said Thursday "we did it because we're in what I would characterize as a 100-year flood on memory pricing with exponential increases in memory prices." Cook did not comment on whether Apple plans to raise iPhone prices when the iPhone 18 Pro models and first foldable launch this September, but multiple analysts believe prices will go up. Cook said Apple is expecting to pay higher memory costs in the September quarter, though Apple will be able to partially offset it with lower costs on some non-memory components and a stockpile of inventory. Sky News points out that "It was Tim Cook's final earnings appearance before his retirement after 15 years at the helm of the company." Apple, which recently topped Nvidia as the most valuable listed company, has been largely spared the volatility in share price seen by chipmakers and big spenders on artificial intelligence. Apple continues to generate cash without the huge investment spending that its Wall St peers are dealing with "and that showed across most parts of the operation," said Thomas Monteiro, an analyst at Investing.com.

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EditorDavid

Hamburg Is Replacing a Bridge In One Huge Piece

3 weeks 3 days ago
Long-time Slashdot reader Qbertino writes: The northern German City of Hamburg is currently in the process of replacing one of its bridges in one single gigantic piece. The new replacement weighs 3700 metric tons and was carefully moved into place over a stretch of 500 meters, requiring extreme patience and precision maneuvering. Some places leave only 40 cm of room to neighbouring buildings.

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EditorDavid